The Justice and Peace Law includes a mechanism under which victims of the Colombian conflict can seek reparation from illegal armed groups. This investigation estimates the potential financial cost to illegal armed groups with respect to the reparation of all victims. It provides a variety of different possible valuations for different categories of victims to which harm occurred between 1964 and 2005. It then combines certain of these valuations to give a feasible estimate of between $55,544,152 and $96,359,032 million pesos of 2006, representing between 19% and 33% of GDP. It is hoped that this investigation will benefit the current discussion regarding reparation of victims and any future balancing of legal obligations with political and resource constraints.